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发明名称
Geraet fuer geometrisches Zeichnen, insbesondere Zeichendreieck
摘要
申请公布号
DE824004(C)
申请公布日期
1951.12.06
申请号
DE1948P028858D
申请日期
1948.12.31
申请人
ALFRED HOFFMANN
发明人
HOFFMANN ALFRED
分类号
B43L7/027
主分类号
B43L7/027
代理机构
代理人
主权项
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